I've recommended a lot of the Brother laser printers over the years - they're inexpensive to purchase and use, easy to configure, and they have solid driver support even at the low end (I've been burned by cheap HP lasers with crappy driver support in business environments). Another feature that the networked multifunctions have is scanning to FTP destinations - I've been astonished how many "business" multifunctions require proprietary client software running on a PC as a scan destination.
The one drawback of the Brother printers is that for heavy use they may not be suitable - they have some parts that are supposed to be replaced at 100,000 pages that would cost as much as a new printer, but I've had a couple older ones still creaking along at ~175,000 pages. I just regard it as a "maintenance kit" for the printer that in fact is a new printer, and they still come out cheaper in a lot of cases. Also, don't get the absolute lowest-end of the Brother multifunctions, I've seen at least one of those be a GDI printer instead of PCL/PS - read the specs.
If you're not sure how many pages/month you'll do, just consider how much paper you purchase - if you're running a box per month, look higher-end for printers.
Finally, a tip: you'll want to configure the printer via network interface (admin/access), because there are settings not available through the control panel - most notably, the default behavior when it reaches the "end" of a toner cartridge is to stop printing, but you can change this to "Continue" through the web interface.